Magnetic nickel-zinc ferrite material and preparation method thereof

A nickel-zinc ferrite and magnetic technology, applied in the field of magnetic nickel-zinc ferrite material and its preparation, can solve the problems of low quality of nickel-zinc ferrite, large difference in physical properties, insufficient sintering, etc. Frequency resonance bandwidth, increase the ball milling area, improve the effect of quality

Pending Publication Date: 2021-01-19
NANJING NEW CONDA MAGNETIC INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of the nickel-zinc ferrite prepared by the above preparation method is low. The reason is analyzed: it is difficult to mix evenly because of the large difference in the physical properties of the raw materials during ball milling; the sintering is not sufficient

Method used

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  • Magnetic nickel-zinc ferrite material and preparation method thereof
  • Magnetic nickel-zinc ferrite material and preparation method thereof
  • Magnetic nickel-zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, one-time batching: put the raw materials , and NiO are mixed uniformly in a mixer to form a mixed material according to the mass ratio of 60.2:14.2:18.1;

[0033] Step 2, primary ball milling: the mixed material in step 1 is placed in a ball milling jar for ball milling; the diameters of the first sphere, the second sphere and the third sphere are 15mm, 10mm and 5mm respectively, and the first sphere, the second sphere The mass ratio of the second sphere and the third sphere is 1:3:2; the mass ratio of the total mass of the first sphere, the second sphere and the third sphere to the powder is 9:1; the rotational speed is 250r / min. Three balls with different diameters are used for ball milling, which can target particles of different particle sizes. Because the particle sizes are not equal, the gaps between particles are not equal, and three balls with different diameters. It can shuttle in the matching gap, increase the ball milling area, not only can grind ...

Embodiment 2

[0044] Step 1, one-time batching: put the raw materials , and NiO are mixed uniformly in a mixer to form a mixed material according to the mass ratio of 68.9:10.3:14.6;

[0045] Step 2, primary ball milling: the mixed material in step 1 is placed in a ball milling jar for ball milling; the diameters of the first sphere, the second sphere and the third sphere are 15mm, 10mm and 5mm respectively, and the first sphere, the second sphere The mass ratio of the second sphere and the third sphere is 1:3:2; the mass ratio of the total mass of the first sphere, the second sphere and the third sphere to the powder is 9:1; the rotational speed is 240r / min.

[0046] Step 3. Pre-burning: heat up the mixture obtained from the primary ball milling to 900°C under the protection of nitrogen, keep it warm for 2 hours, and cool down with the furnace to obtain primary sintering powder; make part of the raw material spinel first, and increase the secondary The performance of the sintered finis...

Embodiment 3

[0055] Step 1, one-time batching: put the raw materials , and NiO are mixed uniformly in a mixer to form a mixed material according to the mass ratio of 65.2:11.1:15.2;

[0056] Step 2, primary ball milling: the mixed material in step 1 is placed in a ball milling jar for ball milling; the diameters of the first sphere, the second sphere and the third sphere are 15mm, 10mm and 5mm respectively, and the first sphere, the second sphere The mass ratio of the second sphere and the third sphere is 1:3:2; the mass ratio of the total mass of the first sphere, the second sphere and the third sphere to the powder is 9:1; the rotational speed is 240r / min.

[0057] Step 3. Pre-burning: heat up the mixture obtained from the primary ball milling to 900°C under the protection of nitrogen, keep it warm for 2 hours, and cool down with the furnace to obtain primary sintering powder; make part of the raw material spinel first, and increase the secondary The performance of the sintered finis...

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Abstract

The invention discloses a magnetic nickel-zinc ferrite material and a preparation method thereof, and belongs to a preparation method of a magnetic material. The chemical formula of the nickel-zinc ferrite is shown in the specification, wherein M is presented in the formula. During secondary sintering, the atmosphere of oxygen protection is adopted, heat is transferred among a gas phase, a solid phase and a liquid phase, the combustion condition is improved, the effect of fully oxidizing low-valent iron oxide is achieved, and the quality of ferrite is improved.

Description

technical field [0001] The invention belongs to a preparation method of a magnetic material, in particular to a magnetic nickel-zinc ferrite material and a preparation method thereof. Background technique [0002] Ni-Zn ferrite has become the most widely used ferrite material in soft ferrite because of its good electrical and magnetic properties. The Curie temperature of Ni-Zn ferrite is 350~450°C, the highest can reach more than 500°C, and the resistivity is as high as , mainly used in the high-frequency stage (10-500MHz), so Ni-Zn ferrite is used to manufacture various inductance components. [0003] At present, the solid state reaction method is one of the methods for preparing magnetic nickel-zinc ferrite, that is, the solid material is used as a raw material for direct ball milling and mixing, and then press molding and high-temperature sintering to obtain ferrite. However, the quality of the nickel-zinc ferrite prepared by the above preparation method is low, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/265C04B35/622C04B2235/3213C04B2235/3281C04B2235/3244C04B2235/6583C04B2235/77
Inventor 杨晓东蒋涛陈小林赵光
Owner NANJING NEW CONDA MAGNETIC INDAL
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